Left dual $(b,c)$-core inverses in rings

Abstract

Let $a,b,c\in R$ where $R$ is a $*$-ring. We call $a$ \textit{left dual $(b,c)$-core invertible} if there exists $x\in Rc$ such that $bxab=b$ and $(xab)^*=xab$. Such an $x$ is called a left dual $(b,c)$-core inverse of $a$. In this paper, characteriztions of left dual $(b,c)$-core invertible element are introduced. We characterize left dual $(b,c)$-core inverses in terms of properties of the left annihilators and ideals. Moreover, we prove that $a$ is left dual $(b,c)$-core invertible if and only if $a$ is left $(b,c)$ invertible and $b$ is \{1,4\} invertible. Also, properties of left dual $(b,c)$-core invertible elements are examined. We present the matrix representations of left dual $(b,c)$-core inverses by the Pierce decomposition. Furthermore, reletions between left dual $(b,c)$-core inverses and the other generalized inverses are given.